Van der Moolen, the Dutch marketmaker and one of the top five firms on the New York Stock Exchange, will make up to €48m ($41m) by selling its entire stake in Euronext in next month's IPO.

The Dutch firm needs the cash after its buying spree in the past year and a collapse in its profits. In the past year, the firm has snapped up six specialist businesses on the floor of the NYSE, giving it a surprise position among the top few firms in New York, with a market share of 12%.